Bump version to 1.2.3-INTERNAL.
Bump version to 1.2.3-INTERNAL.

Change-Id: I2baf2aa41587ccf24331da7cba399cedb296a2e0
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1132
Reviewed-by: Lenni Kuff <724b7df200764f5dc1b723c05ee6c6adabd11bb1@cloudera.com>
Tested-by: jenkins

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